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Ukr. J. Phys. 2015, Vol. 59, N 10, p.1013-1019
doi:10.15407/ujpe59.10.1013    Paper

Gaponova O.P.1, Kolosiuk A.G.2

1 1 Sumy State University
(2, Rimskii-Korsakov Str., Sumy 40007, Ukraine; e-mail: gaponova_op@mail.ru)
2 Institute of Physics, Nat. Acad. of Sci. of Ukraine
(46, Prosp. Nauky, Kyiv 03680, Ukraine; e-mail: anjey.k@gmail.com)

Researches of Diffusion Processes in Powder Materials and their Role in Structure Formation

Section: Solid matter
Original Author's Text: Ukrainian

Abstract: The equation of Fick’s second law describing the diffusion in a porous powder body is solved in the framework of the Green’s function method. The proposed mathematical model allowed the influence of the temperature, deformation rate, and porosity of a material on the diffusion coefficient to be analyzed. The microstructure of copper-titanium specimens after the sintering and a plastic deformation is studied. The increase in the temperature, as well as in the rate and the degree of a deformation, is found to promote the alloy homogenization.

Key words: diffusion, plastic deformation, powder body, powder copper-titanium material.